Diagnosed with Psoriasis, Arthritis and Fibromyalgia, taking medication. What is Symmetric Polyarticular Inflammation?

Hello. I have previously been diagnosed with Psoriasis , Psoriatic Arthritis and Fibromyalgia . I do take medication for these diseases. Recently, while verifying my meds at my Rheumatologist s office, I noticed assessed problems listed as Symmetric Polyarticular Inflammation. I am not familiar with this, and wondered what this applied to. Thank you.